update updates misc if anything changed

makefile

@@ -54,6 +54,7 @@ bundle:
 	
 	cp ./src/boot/output/dmenu.bin ./build/BASE
 	cp ./src/boot/output/dmenu.bin ./build/SYSTEM/rg35xx/dat
+	echo "$(BUILD_HASH)" > ./build/SYSTEM/commit.txt
 	
 	# populate system
 	cp ~/buildroot/output/images/rootfs.ext2 ./build/SYSTEM/rg35xx

src/boot/boot.sh

@@ -35,6 +35,7 @@ fi
 
 # is there an update available?
 if [ -f $UPDATE_PATH ]; then
+	{
 	FLAG_PATH=/misc/.minstalled
 	if [ ! -f $FLAG_PATH ]; then
 		ACTION=installing
@@ -51,6 +52,8 @@ if [ -f $UPDATE_PATH ]; then
 	dd if=/tmp/$ACTION of=/dev/fb0
 	sync
 	
+	# TODO: move this logic into MinUI.zip contents?
+	
 	busybox unzip -o $UPDATE_PATH -d $SDCARD_PATH
 	rm -f $UPDATE_PATH
 	if [ ! -f $FLAG_PATH ]; then
@@ -60,15 +63,44 @@ if [ -f $UPDATE_PATH ]; then
 		cp /misc/boot_logo.bmp.gz $BAK_PATH
 		cp /misc/kernel.dtb $BAK_PATH
 		cp /misc/uImage $BAK_PATH
+	fi
+	
+	was_updated() {
+		for FILE in /misc/* /misc/*/*; do
+			A_PATH=$FILE
+			B_PATH=$SYSTEM_PATH/dat/$(busybox basename "$A_PATH")
+		
+			if [ ! -f "$B_PATH" ]; then
+				continue
+			fi
+		
+			A_SUM=$(busybox md5sum $A_PATH | busybox cut -d ' ' -f 1)
+			B_SUM=$(busybox md5sum $B_PATH | busybox cut -d ' ' -f 1)
+		
+			if [[ "$A_SUM" != "$B_SUM" ]]; then
+				return 0
+			fi
+		done
+		
+		return 1
+	}
+	
+	if [ ! -f $FLAG_PATH ] || was_updated; then
+		echo "updating misc partition"
 		mount -o remount,rw /dev/block/actb /misc
 		rm -f /misc/uImage
 		cp $SYSTEM_PATH/dat/uImage /misc
-		cp $SYSTEM_PATH/dat/boot_logo.bmp.gz /misc
+		cp $SYSTEM_PATH/dat/dmenu.bin /misc
+		if [ ! -f $FLAG_PATH ]; then
+			# only replace boot logo on install not update
+			cp $SYSTEM_PATH/dat/boot_logo.bmp.gz /misc
+		fi
 		cp $SYSTEM_PATH/dat/kernel.dtb /misc
 		cp $SYSTEM_PATH/dat/gpio_keys_polled.ko /misc/modules
 		touch $FLAG_PATH
 		sync && reboot
 	fi
+	} &> /mnt/sdcard/install.txt
 fi
 
 ROOTFS_IMAGE=$SYSTEM_PATH/rootfs.ext2